It is important to remember that, when the climactic battle starts, one should not fire wildly at the ceiling. It doesn't like it.
In the DVD commentary, Kurt Russell cannot stop laughing every time this scene is even referenced.
Jack's summary of his introduction to the supernatural, particularly how he starts off with a fairly even tone of voice and escalates to screaming at the top of his lungs;
What does that mean, huh? "China is here." I don't even know what the hell that means. All I know is this "Lo Pan" character comes out of thin air in the middle of a god-damn alley, while his buddies are flying around on wires cutting everybody to shreds, and he just stands there waiting for me to drive my truckstraight through him,with light coming out of his mouth!
Jack and Wang try to ambush Thunder, who swats them aside like flies on the first try.
Jack: You make one move...
(Thunder immediately knocks Jack away and lifts Wang about five feet in the air)
Jack(recovers and holds a knife to Thunder's throat): Now, let's try that again.
Which leads to...
Jack's continuous yell as he's sitting on an out of control wheelchair rolling down a long ramp straight to a pit.
A horrible monster pops out of the side of a tunnel to eat a guy, and Egg Shen throws an explosive from his bag to banish it.
Egg: It will come out no more!
Jack:What?! Huh? What will come out no more?!
Also this exchange between them:
Jack: That is not water. Egg: Black blood of the earth. Jack: What, you mean oil? Egg: I mean black blood of the earth!
The Three Storms make their debut in a pretty awesome way, but when it comes time for them to go all Improbable Weapon User on us, it also gets ridiculous. Thunder pulls out a couple of funky short swords with bladed knuckle guards, Rain pulls out some pop-out rake things, and, craziest of all, Lightning makes spoons (or something?) rotate on his fingers so fast they become fan blades.
During the final battle, Jack is caught taking his knife out of his boot by a guard and just kicks the blade out of his boot enough to sink it into the guard's stomach....which leaves him trapped for some time as the dead weight of the guard falls on top of him.